JP4614706B2 - High performance gasoline composition - Google Patents

Description

  The present invention relates to a high-performance gasoline composition that maintains quality such as distillation properties and octane number, maintains conventional operating performance, and has improved oxidation stability.

In recent years, the demand for high-performance gasoline has increased with the high performance of automobiles and the increase in the number of vehicles produced. Various methods for increasing the production amount of gasoline base materials have been studied so far, and one of them is a method for blending inexpensive cracked gasoline. However, cracked gasoline, particularly heavy cracked gasoline, contains a compound that affects oxidation stability, so that the blend amount is limited. Further, when blending cracked gasoline, it is necessary to add an antioxidant, and there is a problem that the merit of blending inexpensive cracked gasoline is reduced.
As a gasoline composition for the purpose of improving oxidation stability, a gasoline composition containing an olefin having 6 or less carbon atoms and 7 or more carbon atoms satisfying a specific relationship and having a specified diene value is disclosed (for example, Patent Document 1). However, since the heavy cracked gasoline blended in this gasoline composition has not been subjected to desulfurization treatment, it cannot be said that the oxidation stability of the gasoline composition is sufficient.

Japanese Patent Laid-Open No. 10-316980

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a high-performance gasoline composition that maintains conventional driving performance and has improved oxidation stability.

As a result of intensive studies to solve the above problems, the inventors of the present invention have a high-performance gasoline composition that includes a specific amount of light cracked gasoline and a specific heavy cracked gasoline and satisfies a specific requirement. Found that is achieved. The present invention has been completed based on such findings.
That is, the present invention provides the following high-performance gasoline composition.
1. 10 to 60% by volume of light cracked gasoline based on gasoline composition, 5 to 30% by volume of heavy cracked gasoline desulfurized to 10 mass ppm or less of sulfur content based on gasoline composition, and the following (1) to (6) High performance gasoline composition that meets.
(1) Research octane number exceeding 95 and 102 or less (2) Sulfur content is 10 mass ppm or less (3) Aromatic content is 45% by volume or less (4) Benzene is 1% by volume or less (5) Olefin content is 10 to 10% 30% by volume
(6) 70% by volume distillation temperature is 135 ° C. or lower and 90% by volume distillation temperature is 175 ° C. or lower. 2. The high-performance gasoline composition according to 1 above, wherein the content of an olefin having 8 or more carbon atoms is 0.5 to 5% by volume based on the gasoline composition.
3. 3. The high performance gasoline composition according to 1 or 2 above, wherein the content of olefin having 10 or more carbon atoms is 1% by volume or less based on the gasoline composition.

  ADVANTAGE OF THE INVENTION According to this invention, while maintaining quality, such as a distillation property and an octane number, while maintaining the conventional driving performance, the high performance gasoline composition which improved oxidation stability can be provided.

The high performance gasoline composition of the present invention satisfies the above requirements (1) to (6). That is, in the high-performance gasoline composition of the present invention, the research octane number (hereinafter sometimes abbreviated as RON) needs to be more than 95 and 102 or less, preferably 96 to 102. When RON exceeds 95, the knocking resistance is good. RON is a value measured according to JIS K 2280 “Testing method for octane number and cetane number”.
In the high-performance gasoline composition of the present invention, the sulfur content needs to be 10 ppm by mass or less, preferably 5 ppm by mass or less based on the gasoline composition. If the sulfur content is 10 mass ppm or less, the performance of the catalyst used for the purpose of reducing automobile exhaust gas will not be adversely affected, so CO, THC (total hydrocarbons) and The concentration of NO _x is lowered. Here, the sulfur content is a value measured according to JIS K 2541 “Crude oil and petroleum products—sulfur content test method”.
In the high performance gasoline composition of the present invention, the aromatic content is required to be 45% by volume or less based on the gasoline composition. If the aromatic content is 45% by volume or less, the CO and THC emissions in the exhaust gas of the automobile do not increase. Although there is no restriction | limiting in particular about the minimum of an aromatic component, Usually, it is about 0.1 volume%. Here, examples of the aromatic component include benzene, toluene, xylene, ethylbenzene, propylbenzene, cumene, and ethyltoluene. From the viewpoint of reducing the concentration of benzene suspected of carcinogenicity in the exhaust gas of automobiles, in the present invention, the content of benzene among aromatics is 1% by volume or less based on the gasoline composition. Cost.

  In the high-performance gasoline composition of the present invention, the olefin content needs to be 10 to 30% by volume, preferably 10 to 20% by volume, based on the gasoline composition. When the olefin content is 10% by volume or more, in the direct injection vehicle, the drivability is improved such as no misfire during lean combustion. When the olefin content is 30% by volume or less, the ozone generating ability calculated from the composition of the gasoline composition decreases. Moreover, oxidation stability becomes favorable. The olefin content is basically derived from cracked gasoline, and is usually an olefin having 4 to 12 carbon atoms. Examples of olefins include linear, branched, and cyclic olefins such as 4,4-dimethyl-1-pentene, 1-decene, 2,3-dimethyl-1-pentene, and 4-ethyl-3-. Heptene, 2-methyl-3-ethyl-1-pentene, 1-octene, 2,3-dimethyl-3-hexene, 1-pentene, 2-pentene, 1-hexene, 2-hexene, 2-methyl-1- Butene, 3-methyl-1-butene, 2-ethyl-1-butene, 2-methyl-1-pentene, 4-methyl-1-pentene, 2,3-dimethyl-1-butene, 1-butene and 3, Examples include 3-dimethyl-1-butene.

In the gasoline composition of the present invention, the content of olefins having 8 or more carbon atoms in the olefin content is preferably 0.5 to 5% by volume based on the gasoline composition, more preferably 0.8. It is 6-3 volume%, More preferably, it is 0.7-2 volume%. When the content of the olefin having 8 or more carbon atoms is 0.5% by volume or more, there is an advantage that drivability is improved. Moreover, when it is 5 volume% or less, there exists an advantage that oxidation stability becomes favorable. Among olefins having 8 or more carbon atoms, the content of olefins having 10 or more carbon atoms is preferably 1% by volume or less, more preferably 0.5% by volume or less, based on the gasoline composition. When the content of the olefin having 10 or more carbon atoms is 1% by volume or less, there is an advantage that oxidation stability is improved.
In addition, the said aromatic content and olefin content are the values measured based on JISK2536 "Petroleum product-component test method".

  The high-performance gasoline composition of the present invention has a distillation property of 70 volume% distillation temperature (hereinafter abbreviated as T70) of 135 ° C. or less and 90 volume% distillation temperature (hereinafter abbreviated as T90). Is required to be 175 ° C. or less, preferably T70 is 105 to 130 ° C. and T90 is 120 to 170 ° C. When T70 is 135 ° C. or lower, the drivability of the vehicle is good, and when T90 is 175 ° C. or lower, the acceleration of the engine is good. T70 and T90 are values measured in accordance with JIS K 2254 “Petroleum products-distillation test method”.

  The high-performance gasoline composition of the present invention contains 10 to 60% by volume of light cracked gasoline based on the gasoline composition, and 5 to 30% by volume of heavy cracked gasoline desulfurized to a sulfur content of 10 mass ppm or less based on the gasoline composition. It can be prepared by blending these light cracked gasoline, desulfurized heavy cracked gasoline and other gasoline base materials so as to satisfy the above conditions (1) to (6). The light cracked gasoline is composed of a light portion having a distillation property obtained by distillation of cracked gasoline obtained by a catalytic cracking method or the like. In the high-performance gasoline composition of the present invention, the content of the light cracked gasoline is determined by the gasoline composition. By setting the amount to 10 to 60% by volume on the basis of physical properties, an effect that the drivability is improved can be obtained. The content of this light cracked gasoline is preferably 20 to 50% by volume, more preferably 25 to 40% by volume.

  The heavy cracked gasoline is composed of a heavy portion (initial boiling point: 70 ° C. or higher) having a distillation property obtained by distillation of the cracked gasoline. In the present invention, the heavy cracked gasoline is desulfurized to obtain a sulfur content. The desulfurized heavy cracked gasoline with 10 ppm by mass or less is used. By setting the sulfur content in the heavy cracked gasoline to 10 mass ppm or less, a high-performance gasoline composition having a low sulfur content can be obtained. By setting the content of this desulfurized heavy cracked gasoline to 5 to 30% by volume on the basis of the gasoline composition, the effect of improving oxidation stability and operability can be obtained. The content of the desulfurized heavy cracked gasoline is preferably 5 to 25% by volume, more preferably 5 to 20% by volume. In addition, desulfurization of heavy cracked gasoline can be performed by a known desulfurization treatment.

  Other gasoline base materials include light naphtha obtained by fractionating a naphtha fraction obtained by atmospheric distillation of crude oil, the remaining fraction obtained by removing the benzene fraction from reformed gasoline obtained by a catalytic reforming method, Polymerized gasoline obtained by polymerization of olefins, alkylate gasoline obtained by adding lower olefins to hydrocarbons such as isobutane, isomate gasoline obtained by isomerization of linear lower paraffinic hydrocarbons, de-n-paraffins Oils and their specific ranges of fractions and aromatic hydrocarbons.

  In the high-performance gasoline composition of the present invention, various additives can be appropriately blended as necessary. Examples of such additives include antioxidants such as phenols and amines, metal deactivators such as Schiff compounds and thioamide compounds, surface ignition inhibitors such as organophosphorus compounds, succinimides, Detergents such as polyalkylamines and polyetheramines, anti-icing agents such as polyhydric alcohols and ethers, auxiliary agents such as alkali metals and alkaline earth metal salts of organic acids, sulfates of higher alcohols, anionic surface activity Agents, cationic surfactants, amphoteric surfactants, antistatic agents such as alkenyl succinic acid esters, identifiers such as kilyzanine and coumarin, odorants such as natural essential oils and synthetic fragrances, azo dyes, etc. Well-known fuel oil additives, such as these coloring agents, are mentioned, These 1 type (s) or 2 or more types can be added. Further, the addition amount of these additives may be appropriately selected according to the situation, but it is usually desirable that the total amount of additives is 0.1% by mass or less of the gasoline composition.

EXAMPLES Next, although an Example demonstrates this invention further in detail, this invention is not limited at all by these examples.
Examples 1 to 3 and Comparative Examples 1 to 3
Desulfurized heavy cracked gasoline (desulfurized HFG), heavy cracked gasoline (HFG), light cracked gasoline (LFG), debenzene reformed gasoline (PGPZ), desulfurized light naphtha (DLN), having the properties shown in Table 1. An amine-based antioxidant (N, N′-di-sec-butyl-p-phenylenediamine) was mixed at a ratio shown in Table 2 to prepare a gasoline composition shown in Table 2. In Tables 1 and 2, IBP represents the initial distillation point, Tn (n = 10, 30, 50, 70, 90) represents the n vol% distillation temperature, and EP represents the distillation end point.
About each gasoline base material and gasoline composition, it measured based on JISK2287 "gasoline-oxidation stability test method-induction period method". In this test method, the longer the induction period, the higher the oxidation stability. The measurement results are shown in Tables 1 and 2.

  In the gasoline composition of the present invention, the oxidation stability (induction period) of the gasoline compositions of Examples 1 to 3 shown in Table 2 and the oxidation stability of the gasoline compositions of Comparative Examples 1 to 3 were compared. It can be seen that even when the addition amount of the agent is small, the oxidation stability (induction period) can be 240 minutes or more.

The gasoline composition of the present invention is suitable as a fuel for an internal combustion engine and can be stored for a long time.

Claims (3)

10 to 60% by volume of light cracked gasoline based on gasoline composition, 5 to 30% by volume of heavy cracked gasoline desulfurized to 10 mass ppm or less of sulfur content based on gasoline composition, and the following (1) to (6) High performance gasoline composition that meets.
(1) Research octane number exceeding 95 and 102 or less (2) Sulfur content is 10 mass ppm or less (3) Aromatic content is 45% by volume or less (4) Benzene is 1% by volume or less (5) Olefin content is 10 to 10% 30% by volume
(6) 70 vol% distillation temperature is 135 ° C or lower, 90 vol% discharge temperature is 175 ° C or lower   The high-performance gasoline composition according to claim 1, wherein the content of the olefin having 8 or more carbon atoms is 0.5 to 5% by volume based on the gasoline composition. The high-performance gasoline composition according to claim 1 or 2, wherein the content of an olefin having 10 or more carbon atoms is 1% by volume or less based on the gasoline composition.